HINT: Discoveries

Yesterday in Karazhan while I was drinking buff pots I heard a ding noise over my headset as if I had leveled up. Looking to my chatlog, it told me I had made a discovery on how to make a Flask of Shadow Fortification.

A response by a Green.

Quote :

This is the Alchemy discovery system. There are some recipes you learn just working the skill. That is the same Flask I discovered while making healing power pots. This was a part of the expansion.

Basically, randomly, as you create, you will "Discover" a new recipe. All you do is create, create, create and hope!